18234113 has 2 divisors, whose sum is σ = 18234114. Its totient is φ = 18234112.

The previous prime is 18234103. The next prime is 18234131. The reversal of 18234113 is 31143281.

Together with next prime (18234131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17581249 + 652864 = 4193^2 + 808^2 .

It is a cyclic number.

It is not a de Polignac number, because 18234113 - 2¹⁸ = 17971969 is a prime.

It is not a weakly prime, because it can be changed into another prime (18234103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9117056 + 9117057.

It is an arithmetic number, because the mean of its divisors is an integer number (9117057).

Almost surely, 2^18234113 is an apocalyptic number.

It is an amenable number.

18234113 is a deficient number, since it is larger than the sum of its proper divisors (1).

18234113 is an equidigital number, since it uses as much as digits as its factorization.

18234113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 18234113 is about 4270.1420351084. The cubic root of 18234113 is about 263.2054518030.

Adding to 18234113 its reverse (31143281), we get a palindrome (49377394).

The spelling of 18234113 in words is "eighteen million, two hundred thirty-four thousand, one hundred thirteen".